Self-adhesive waterproof vapor-permeable film

Abstract

The utility model belongs to the technical field of waterproof vapor-permeable films, and discloses a self-adhesive waterproof vapor-permeable film. The self-adhesive waterproof vapor-permeable membrane comprises a waterproof vapor-permeable membrane substrate layer, a vapor-permeable self-adhesive pressure-sensitive adhesive layer and an isolating membrane layer which are sequentially stacked from top to bottom. The self-adhesive waterproof vapor-permeable film is composed of the waterproof vapor-permeable film and the self-adhesive pressure-sensitive adhesive, and both the waterproof vapor-permeable film and the self-adhesive pressure-sensitive adhesive can achieve good vapor permeability, so that the self-adhesive waterproof vapor-permeable film has more excellent vapor permeability, and in addition, the self-adhesive waterproof vapor-permeable film further has good cohesiveness and construction convenience.

Description

Technical Field

[0001] The utility model belongs to the technical field of waterproof and breathable membranes, and more specifically relates to a self-adhesive waterproof and breathable membrane. Background Art

[0002] Waterproof vapor-permeable membranes are primarily used above the insulation layer to ensure the smooth escape of water vapor from within the building, preventing rainwater intrusion and condensation from seeping back into the insulation layer, and ensuring the proper function of the insulation layer. In construction, they are primarily used in timber-framed buildings, steel roofs, and exterior decorative insulation curtain walls.

[0003] At present, conventional self-adhesive waterproof breathable membranes all use styrene or butyl hot melt pressure sensitive adhesive as the self-adhesive layer. After the adhesive is applied, the vapor permeability of the membrane will quickly drop to 10g / m 2 .Within 24 hours, it does not have true breathability.

[0004] To achieve vapor permeability, existing technologies typically reduce the adhesive application area, using localized adhesive application methods such as spot coating or mesh coating. For example, patent CN205314378U describes a self-adhesive layer using microporous hot-melt pressure-sensitive adhesive with a diameter of 50-300 μm, with the micropores accounting for 70-85% of the total adhesive layer area. However, this technology inevitably leads to complex manufacturing processes, difficulty in controlling quality, and compromised bonding strength.

[0005] In addition, the existing construction method of waterproof breathable membrane is loose laying and pasting or riveting and fixing, pasting sealing tape on the fixed part, and then fixing it to the base with plastic anchor bolts, but this method is not suitable for vertical walls.

[0006] Therefore, a new self-adhesive waterproof breathable membrane needs to be proposed urgently. Utility Model Content

[0007] The purpose of this utility model is to address the shortcomings of the existing technology and provide a self-adhesive waterproof vapor-permeable membrane. The self-adhesive waterproof vapor-permeable membrane of the utility model is composed of a waterproof vapor-permeable membrane and a self-adhesive pressure-sensitive adhesive. Both the waterproof vapor-permeable membrane and the self-adhesive pressure-sensitive adhesive can achieve good water vapor permeability, making the self-adhesive waterproof vapor-permeable membrane of the utility model have better vapor permeability. In addition, it also has good adhesion and convenient construction.

[0008] To achieve the above object, the utility model provides a self-adhesive waterproof vapor-permeable membrane, which includes a waterproof vapor-permeable membrane base material layer, a vapor-permeable self-adhesive pressure-sensitive adhesive layer and an isolation film layer stacked in sequence from top to bottom.

[0009] Preferably, a primer layer is further provided between the waterproof vapor-permeable membrane base material layer and the vapor-permeable self-adhesive pressure-sensitive adhesive layer.

[0010] Preferably, the material of the vapor-permeable self-adhesive pressure-sensitive adhesive layer is a solvent-based acrylic pressure-sensitive adhesive. Preferably, the solvent-based acrylic pressure-sensitive adhesive is selected from Toyo Ink STS0311 or Toyo Ink STS0314.

[0011] Preferably, the waterproof vapor-permeable membrane substrate layer is one of an integrated structural membrane formed by flash spinning and extrusion of high-density polyethylene, a microporous composite membrane formed by uniaxial stretching, and a coated composite membrane coated with a vapor-permeable polymer coating.

[0012] Preferably, the integrated structural membrane formed by flash spinning and extrusion of high-density polyethylene is selected from DuPont Tyvek Supro2507B.

[0013] Preferably, the uniaxially stretched microporous composite membrane is selected from Prima PREM145.

[0014] Preferably, the composite membrane coated with the vapor-permeable polymer coating is selected from Intrepu B20.

[0015] Preferably, the thickness of the waterproof vapor permeable membrane base material layer is 0.1-5.0 mm, and the weight is 50-500 g / m 2 .

[0016] Preferably, the isolation film layer is release paper or release film.

[0017] Preferably, the release paper and the release film each independently include a substrate and a coating coated on the substrate.

[0018] Preferably, the substrate is one of kraft paper, glassine paper, PET film, polyolefin film and aluminum foil.

[0019] Preferably, the coating is one of organic silicon, fluoride and fluorine-silicon copolymer.

[0020] Preferably, the vapor-permeable self-adhesive pressure-sensitive adhesive layer is fully coated on the isolation film layer.

[0021] Preferably, the coating dry weight of the self-adhesive pressure-sensitive adhesive is 50-300 g / m 2 .

[0022] Preferably, the primer layer is a modified olefin polymer. Preferably, the modified olefin polymer is selected from UNITIKA SB-5013N or UNITIKA SB-5010N100.

[0023] Preferably, the thickness of the primer layer is 0.1-2 μm, and the coating dry weight is 0.1-2 g / m 2 .

[0024] The beneficial effects of the technical solution of the utility model are as follows:

[0025] The self-adhesive waterproof breathable membrane of the utility model is composed of a waterproof breathable membrane and a self-adhesive pressure-sensitive adhesive. Both the waterproof breathable membrane and the self-adhesive pressure-sensitive adhesive can achieve good water vapor permeability, making the self-adhesive waterproof breathable membrane of the utility model have better vapor permeability, and the water vapor permeability can reach 100g / m 2 .24h or more or the SD value of the air equivalent layer thickness is less than 1m (an indicator of water vapor permeability). However, the current self-adhesive waterproof breathable membranes are not breathable. After the glue is applied, the water vapor permeability of the membrane will quickly drop to 10g / m 2 .24h or the air equivalent layer thickness SD value is above 4m.

[0026] The self-adhesive pressure-sensitive adhesive in this utility model's self-adhesive waterproof breathable membrane can be fully coated on the isolation membrane layer, that is, fully coated on the waterproof breathable membrane, and fully adheres to the substrate. The adhesive layer is thick, with a large contact area and a strong bond. During application, no overlapping bonding is required, improving construction efficiency. It is also water-proof (no water leakage channels exist, preventing water from passing through the gaps) and windproof, and can also be used on vertical walls.

[0027] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0029] Figure 1 A schematic diagram of a self-adhesive waterproof breathable membrane provided by the utility model is shown.

[0030] The following are the descriptions of the reference numerals:

[0031] 1- waterproof vapor permeable membrane base material layer, 2- primer layer, 3- vapor permeable self-adhesive pressure-sensitive adhesive layer, 4- isolation film layer. DETAILED DESCRIPTION

[0032] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] The utility model provides a self-adhesive waterproof vapor-permeable membrane, which comprises a waterproof vapor-permeable membrane base material layer, a vapor-permeable self-adhesive pressure-sensitive adhesive layer and an isolation membrane layer which are sequentially stacked from top to bottom.

[0034] In one example, a primer layer is further provided between the waterproof vapor-permeable membrane substrate layer and the vapor-permeable self-adhesive pressure-sensitive adhesive layer.

[0035] In one example, the material of the vapor-permeable self-adhesive pressure-sensitive adhesive layer is a solvent-based acrylic pressure-sensitive adhesive. Preferably, the solvent-based acrylic pressure-sensitive adhesive is selected from Toyo Ink STS0311 or Toyo Ink STS0314.

[0036] In one example, the waterproof and breathable membrane base layer is one of an integrated structural membrane formed by flash spinning and extrusion of high-density polyethylene, a microporous composite membrane formed by unidirectional stretching, and a coated composite membrane coated with a breathable polymer coating; preferably, the integrated structural membrane formed by flash spinning and extrusion of high-density polyethylene is selected from DuPont TyvekSupro2507B; preferably, the microporous composite membrane formed by unidirectional stretching is selected from Prima PREM145; preferably, the coated composite membrane coated with a breathable polymer coating is selected from Interrup B20.

[0037] In one example, the surface dyne value of the waterproof vapor-permeable membrane substrate layer is greater than 42.

[0038] In one example, the thickness of the waterproof vapor permeable membrane base material layer is 0.1-5.0 mm, and the weight is 50-500 g / m 2 .

[0039] In one example, the isolation film layer is release paper or release film.

[0040] In one example, the release paper and the release film each independently include a substrate and a coating layer coated on the substrate.

[0041] In one example, the substrate is one of kraft paper, glassine paper, PET film, polyolefin film and aluminum foil.

[0042] In one example, the coating is one of silicone, fluoride, and fluorine-silicon copolymer.

[0043] In one example, the vapor-permeable self-adhesive pressure-sensitive adhesive layer is fully coated on the isolation film layer.

[0044] In one example, the coating dry weight of the self-adhesive pressure-sensitive adhesive is 50-300 g / m 2 .

[0045] In one example, the primer layer is a modified olefin polymer. Preferably, the modified olefin polymer is selected from UNITIKA SB-5013N or UNITIKA SB-5010N100.

[0046] In one example, the thickness of the primer layer is 0.1-2 μm, and the coating dry weight is 0.1-2 g / m 2 .

[0047] In the present invention, the method for preparing the self-adhesive waterproof vapor-permeable membrane comprises the following steps:

[0048] S1: providing a waterproof vapor-permeable membrane substrate layer 1, and performing corona treatment on the surface of the waterproof vapor-permeable membrane substrate layer to make the surface dyne value of the waterproof vapor-permeable membrane substrate layer reach 42 or above, and optionally coating a primer component thereon to form a primer layer 2, and drying at 65-95°C;

[0049] S2: coating the vapor permeable self-adhesive pressure-sensitive adhesive on the isolation film layer 4 to form a vapor permeable self-adhesive pressure-sensitive adhesive layer 3, and drying at 80-150° C.;

[0050] S3: The isolation film layer 4 coated with the vapor-permeable self-adhesive pressure-sensitive adhesive layer 3 obtained in step S2 and the waterproof vapor-permeable membrane substrate layer 1 optionally coated with the primer layer 2 obtained in step S1 are composited and rolled up using a composite roller to obtain the self-adhesive waterproof vapor-permeable membrane.

[0051] Example 1

[0052] This embodiment provides a self-adhesive waterproof breathable membrane, such as Figure 1 As shown, the self-adhesive waterproof vapor-permeable membrane comprises a waterproof vapor-permeable membrane base material layer 1, a primer layer 2, a vapor-permeable self-adhesive pressure-sensitive adhesive layer 3 and an isolation membrane layer 4 which are stacked in sequence from top to bottom.

[0053] The waterproof vapor permeable membrane substrate layer 1 is an integrated structural membrane formed by flash spinning and extrusion of high-density polyethylene, DuPont Tyvek Supro2507B, with a thickness of 0.2 mm and a surface dyne value of more than 42.

[0054] The primer layer 2 is a modified olefin polymer manufactured by UNITIKA SB-5013N. The thickness is 0.2 μm and the coating dry weight is 0.2 g / m 2 .

[0055] The vapor permeable self-adhesive pressure-sensitive adhesive layer 3 is a solvent-based acrylic pressure-sensitive adhesive, Toyo Ink STS0311.

[0056] The isolation film layer 4 is a 50um PET (base material) silicone (coating) release film. The vapor permeable self-adhesive pressure-sensitive adhesive layer 3 is fully coated on the isolation film layer 4; the coating dry weight of the vapor permeable self-adhesive pressure-sensitive adhesive is 150g / m 2 .

[0057] Example 2

[0058] This embodiment provides a self-adhesive waterproof breathable membrane. The only difference between this embodiment and embodiment 1 is that the waterproof breathable membrane base material layer 1 is a uniaxially stretched microporous composite membrane, Prima PREM145, with a thickness of 0.5 mm and a surface dyne value of more than 42.

[0059] Example 3

[0060] This embodiment provides a self-adhesive waterproof breathable membrane. The only difference between this embodiment and embodiment 1 is that the membrane does not contain a primer layer 2.

[0061] Comparative Example 1

[0062] This comparative example provides a self-adhesive waterproof vapor-permeable membrane. The difference between this comparative example and Example 1 is that:

[0063] The self-adhesive waterproof vapor-permeable membrane comprises a waterproof vapor-permeable membrane base material layer 1, a primer layer 2, a pressure-sensitive adhesive layer and an isolation membrane layer 4 which are stacked in sequence from top to bottom.

[0064] The pressure-sensitive adhesive layer is a hot-melt styrene thermoplastic elastomer and is hot-melt coated on the isolation film layer 4 with a melting temperature of 180°C.

[0065] Test Case

[0066] This test example tested the peel strength, vapor permeability, and waterproof performance of the self-adhesive waterproof breathable membranes provided in the Examples and Comparative Examples. The testing standards referenced the "Technical Specification for the Application of Airtight Materials for Buildings" (T / CECS826-2021). The peel strength test followed the "180° Peel Strength Test Method for Adhesives - Flexible to Rigid Materials" (GB / T2790), the water vapor permeability followed the "Test Method for Water Vapor Permeability of Building Materials" (GB / T17146), and the water impermeability followed the "Water Impermeability of Asphalt and Polymer Waterproofing Membranes" (GB / T328.10-2007). The results are shown in Table 1.

[0067] Table 1

[0068]

[0069] From the results in Table 1 we can see that:

[0070] Comparative Example 4 uses styrene thermoplastic elastomer as the pressure-sensitive adhesive layer. Compared with the examples, the vapor permeability and adhesion are poor.

[0071] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A self-adhesive waterproof breathable membrane, characterized in that: The self-adhesive waterproof vapor-permeable membrane comprises a waterproof vapor-permeable membrane base material layer, a vapor-permeable self-adhesive pressure-sensitive adhesive layer and an isolation membrane layer which are stacked in sequence from top to bottom; The vapor permeable self-adhesive pressure-sensitive adhesive layer is fully coated on the isolation film layer; A primer layer is further provided between the waterproof vapor-permeable membrane base material layer and the vapor-permeable self-adhesive pressure-sensitive adhesive layer; The material of the vapor-permeable self-adhesive pressure-sensitive adhesive layer is solvent-based acrylic pressure-sensitive adhesive.

2. The self-adhesive waterproof breathable membrane according to claim 1, characterized in that: The solvent-based acrylic pressure-sensitive adhesive is selected from Toyo Ink STS0311 or Toyo Ink STS0314.

3. The self-adhesive waterproof breathable membrane according to claim 1, characterized in that: The waterproof vapor-permeable membrane base material layer is one of an integrated structural membrane formed by flash spinning and extrusion of high-density polyethylene, a microporous composite membrane formed by unidirectional stretching, and a coated composite membrane coated with a vapor-permeable polymer coating.

4. The self-adhesive waterproof breathable membrane according to claim 3, characterized in that: The integrated structural film formed by flash spinning and extrusion of high-density polyethylene is selected from DuPont Tyvek Supro 2507B.

5. The self-adhesive waterproof breathable membrane according to claim 3, characterized in that: The uniaxially stretched microporous composite membrane is selected from Prima PREM145.

6. The self-adhesive waterproof breathable membrane according to claim 3, characterized in that: The composite membrane coated with the vapor-permeable polymer coating is selected from Intrepu B20.

7. The self-adhesive waterproof breathable membrane according to claim 3, characterized in that: The thickness of the waterproof vapor permeable membrane base material layer is 0.1-5.0mm, and the weight is 50-500g / m 2 .

8. The self-adhesive waterproof breathable membrane according to claim 1, characterized in that: The isolation film layer is release paper or release film.

9. The self-adhesive waterproof breathable membrane according to claim 8, characterized in that: The release paper and the release film each independently include a substrate and a coating coated on the substrate; The substrate is one of kraft paper, glassine paper, PET film, polyolefin film and aluminum foil; The coating is one of organic silicon, fluoride and fluorine-silicon copolymer.

10. The self-adhesive waterproof breathable membrane according to claim 1, characterized in that: The coating dry weight of the self-adhesive pressure-sensitive adhesive is 50-300 g / m 2 .

11. The self-adhesive waterproof breathable membrane according to claim 1, characterized in that: The primer layer is a modified olefin polymer; The thickness of the primer layer is 0.1-2 μm, and the coating dry weight is 0.1-2 g / m 2 .

12. The self-adhesive waterproof breathable membrane according to claim 11, characterized in that: The modified olefin polymer is selected from UNITIKA SB-5013N or UNITIKA SB-5010N100.

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